Stockholders' Deficit - Cash Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands					6 Months Ended
	Oct. 01, 2019	Aug. 23, 2019	Aug. 12, 2019	Jul. 18, 2019	Jun. 30, 2019	Jul. 01, 2018
Cash Dividend
Total dividends paid					$ 19,600
Dividends paid to common shareholders					14,200
Dividends paid to common shareholders					$ 14,269	$ 14,762
Quarterly dividend paid per common share (in dollars per share)					$ 0.45
Common stock dividends paid to preferred shareholders					$ 2,000
Preferred dividends					$ 3,400
Preferred stock dividend rate					3.60%
Forecast
Cash Dividend
Dividends paid to common shareholders				$ 7,100
Common stock dividends paid to preferred shareholders				$ 1,100
Preferred dividends	$ 2,300
Subsequent event
Cash Dividend
Quarterly dividend declared, per share (in dollars per share)				$ 0.225
Subsequent event | Common Stock
Cash Dividend
Quarterly dividend, date of declaration				Jul. 18, 2019
Quarterly dividend, date of distribution		Aug. 23, 2019
Quarterly dividend, date of record			Aug. 12, 2019
Subsequent event | Preferred Stock
Cash Dividend
Quarterly dividend, date of declaration				Jul. 18, 2019
Quarterly dividend, date of distribution	Oct. 01, 2019